Sample Quiz

What is the minimum current required to operate a 20A Type C circuit-breaker on overload?

What is the minimum current required for automatic operation of a 20A Type C circuit-breaker under short-circuit conditions?

Which of the following is most suitable for providing protection against earth leakage current?

When selecting and installing circuit-breakers in a “cascading” arrangement, the device with fault current limiting capability must be installed:

Which three (3) of the following may cause overvoltage in an electrical system?

Which three (3) of the following may cause undervoltage in an electrical system?

Which four (4) of the following are used to protect against overvoltage in an installation?

Which two (2) of the following would protect against undervoltage?

What is the maximum rated residual current permitted for RCDs used to protect final subcircuits in a domestic or residential installation?

In a residential installation with more than one final subcircuit, the maximum number of circuits that a single RCD can protect is:

What is one limitation of an RCD with regard to protection against contact with live parts?

Which three (3) of the following statements are true of isolating switches?

Which four (4) of the following statements are true of emergency switches?

Which four (4) of the following statements are true of switching for mechanical maintenance?

Which three (3) of the following statements are true of function (control) switching?

What is the main purpose for using SELV and PELV circuits to reduce hazards and risks in an electrical installation?

Which of the following is true of SELV and PELV circuit arrangements?

Which of the following is true of earthing SELV systems?

Which of the following is true of earthing PELV systems?

According to AS/NZS 3000, what should be the result of an insulation resistance test on an SELV or PELV system?

Where a three-phase installation contains a substantial load that generates harmonic currents (e.g. variable speed drives), neutral conductors:

What is the minimum required horizontal clearance between a socket-outlet and the edge of the water container of a bath?

What is the minimum required horizontal clearance between a socket-outlet and the edge of the water container of a 20-litre kitchen sink?

What is the minimum IP rating for a surface mounted light fitting installed directly above a shower where the ceiling height is 2.4 metres?

A socket-outlet for pool equipment is to be installed in the restricted zone around a pool. What is the required IP rating of the socket-outlet if installed in Zone 1?

Which three (3) of the following are suitable methods of supplying a socketoutlet in Zone 3 of a damp situation?

What is the minimum permissible size for an equipotential bonding conductor for the bonding of exposed metal in showers, bathrooms, and conductive pool structures in swimming and spa pool zones?

What is the minimum IP rating for the enclosure of a construction site switchboard?

Where a transportable site shed on a construction site is supplied via flexible cord to a 15A inlet socket on the shed, the circuit supplying the flexible cord must have:

What are the AS/NZS 3012 requirements for circuits supplying socket-outlets and lighting points on a construction site?

To ensure the correct calibration of an insulation resistance tester, the DC test voltage when measuring a resistance of 1MΩ must be between:

According to AS/NZS 3012, portable electric power tools used on a construction site must be inspected, tested and tagged every:

According to AS/NZS 3012, construction wiring must be visually inspected and results documented when initially installed, and then periodically every:

Which of the following cable types is NOT permitted by AS/NZS 3000 as an aerial cable?

What is the maximum span for an aerial bundled cable?

An insulated parallel-webbed aerial cable is to be installed over an area used by vehicles to supply an outbuilding. What is the minimum height specified by AS/NZS 3000 for the aerial cable above ground level?

A 25mm² twin aerial bundled cable (ABC) is to be installed as a single-phase service to a residential premises. Under what two (2) conditions would a customer private pole be required to ensure compliance with both AS/NZS 3000 and with the NSW Service and Installation Rules?

Where an aerial service cable terminates at the point of attachment, a service bracket or strut may be required if the distance from the ground floor or platform to the point of attachment is less than:

A catenary support system is to be used to run a 2.5mm² TPS cable across the backyard of a residential premises. The area is not used by vehicles. What is the minimum height specified by AS/NZS 3000 for the catenary support system above finished ground level?

What is the minimum depth of burial for a Category A underground wiring system installed external to a building in an area covered by poured concrete of 75mm minimum thickness?

What is the minimum separation distance between an underground low voltage wiring system and an underground telecommunications conduit?

What are the two (2) general classifications of Hazardous Area recognised by AS/NZS 3000?

According to AS/NZS 60079.14, a person required to install electrical equipment in a “Hazardous Area” is required to have:

Regarding cable routes through buildings, structures and premises, which three (3) of the following are deemed by AS/NZS 3000 as locations where wiring systems are likely to be disturbed?

What is the purpose of “cable lube”?

What are the AS/NZS 3000 requirements for the placing and fixing of a TPS submain cable to a floor joist near the underside of floorboards?

What are the three (3) general requirements specified by AS/NZS 3000 for electrical connections and terminations?

What is the minimum size of conduit permissible for unprotected underground consumer mains to meet the requirements of the NSW Service and Installation Rules?

What is the minimum size and type of cable permissible for unprotected aerial consumer mains to meet the requirements of the NSW Service and Installation Rules?

Termination of consumer mains at an Electricity Distributor’s pit or pillar may be performed by:

Where consumer mains are not protected on the supply side by a short-circuit protective device, they must be installed in a manner that reduces the risk of a short-circuit occurring. Which of the following consumer main arrangements meet the AS/NZS 3000 requirements for short-circuit protection?

The polarity of consumer mains must be tested prior to connection to prevent the risk of:

What is the minimum distance required from the front of a commercial switchboard to allow for accessibility?

Which of the following is a restricted location in which a switchboard may NOT be installed under any circumstances?

Which two (2) of the following are acceptable places for indicating the location of the main switchboard in a commercial premises?

According to AS/NZS 3000, which two (2) of the following are applicable regarding the construction of switchboards?

What fire protection measures must be taken if a switchboard is enclosed in a case or surround?

Over what rating (in amps) does a switchboard require protection against internal arcing fault currents to meet AS/NZS 3000 requirements?

Which three (3) of the following are recommended precautions for the connection and disconnection of potential (instrument) transformers?

Due to the risk associated with high voltages at the output terminals, what must be done with a current transformer before disconnecting it from a load for testing purposes?

Which of the following are special requirements for motor protection in moist environments?

What is the most cost-effective starter for a three-phase motor where starting current is not an issue?

An overload relay for a three-phase induction motor should be rated according to the motor:

Electronic soft starter circuits usually include bypass contacts that are either incorporated into the device or installed externally. What is the purpose of bypass contacts?